by Jonathan » Sat Feb 04, 2006 8:06 pm
"Any time I set up a car - before arbitrarily "just angling it" some imaginary angle - make a baffle out of wood, screw the speaker to it.
Mount a wood panel to the door.
Take small pieces of wood, or even very long screws, and temporarily suspend that speaker at different angles - with no tweeters connected - just listen to the mid (on the crossover, just like it's supposed to be )."
Fully agree with Geo on this one. I never saw the point in people bragging about speakers being laser aligned with the dome light, it won't guarantee anything with the odd shapes you encounter in a car. In addition to his advice, one thing I do is use Plumber's strap, it's stiff enough to hold a speaker in place and flexible enough to allow you to tweak angling in the process. Once I get the angling right, I make bracing to hold the MDF ring in place while stretching fleece over it.
"And it's not so much important to keep the "mid and the tweeter near each other", because that's not what matters - what matters really is keeping the pathlength distance (the distance from each speaker to your ear) equal, with regard to the tweeter and the mid - and one way that risk is often minimized is to locate the tweeter near the mid.
But ultimately, it's phasing anomolies you are looking to eliminate, that are possible if there is a difference in pathlength distances comparing the tweeter to the mid."
Amen. This concept seems to baffle even experienced competitors, and past that you also get into Head Related Transfer Function, in which imaging won't even depend upon pathlength, it's all about volume past that point (within reason, of course). So many concepts that people seem to miss, primarily how to cater to the characteristics of the human auditory system.
"Any time I set up a car - before arbitrarily "just angling it" some imaginary angle - make a baffle out of wood, screw the speaker to it.
Mount a wood panel to the door.
Take small pieces of wood, or even very long screws, and temporarily suspend that speaker at different angles - with no tweeters connected - just listen to the mid (on the crossover, just like it's supposed to be )."
Fully agree with Geo on this one. I never saw the point in people bragging about speakers being laser aligned with the dome light, it won't guarantee anything with the odd shapes you encounter in a car. In addition to his advice, one thing I do is use Plumber's strap, it's stiff enough to hold a speaker in place and flexible enough to allow you to tweak angling in the process. Once I get the angling right, I make bracing to hold the MDF ring in place while stretching fleece over it.
"And it's not so much important to keep the "mid and the tweeter near each other", because that's not what matters - what matters really is keeping the pathlength distance (the distance from each speaker to your ear) equal, with regard to the tweeter and the mid - and one way that risk is often minimized is to locate the tweeter near the mid.
But ultimately, it's phasing anomolies you are looking to eliminate, that are possible if there is a difference in pathlength distances comparing the tweeter to the mid."
Amen. This concept seems to baffle even experienced competitors, and past that you also get into Head Related Transfer Function, in which imaging won't even depend upon pathlength, it's all about volume past that point (within reason, of course). So many concepts that people seem to miss, primarily how to cater to the characteristics of the human auditory system.